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niiet ltartes legittimi ffrr.

Witnesses:

DAVID B. HEARRINTON, OF DETROIT, MICHIGAN n Letters .Patent No. 68,876,dated September 17, 1867.

IMPROVEMENT IN HANGING GRINDSTONES.

TO ALL WHOM IT MAY CONGERN:

Beit known that I, DAVID B. HERRINTON, of Detroit, in the county ofWayne, inthe State of Michigan, have invented a new and improved Methodof Hanging Grindstones and Pulleys; and I do declare that` the followingis a true and accurate description thereof, reference being had to theaccompanying drawingsfand to the letters of reference marked thereon,being a. part of this specification. v

Figure 1 represents a side view of my invention.

Figure 2 is a, top view ofthe same. i

` The saine letters refer to similar parts in each figure. p

IA represents a grindstone or pulley, and B the shaft upon'which it ishung. Upon each oilthe four sides ofthe shaft A are placed the plates DD, &c., provided with proper set-screws C C, &c. By the means of theseset-screws C C, &o., the grindstone or pulley may be perfectly adjusted'upon the shaft B, so that theperiphery ofthe grindstone or pulley A willbe equally distant from the centre at all points.

' WhatI claim as my invention, and desire to secure by Letters Patent,is

The arrangement and combination of the plates D D7 &c., and theset-screws C C, &`c., with the grindstne or pulley A and the shaft B, orany other device substantially the same, for the purpose designed. i

DAVID B. HEREIN TON.

R. J. llnnnzrs,l "l Taos. J. SPRAGUE.

